Logging apparatus.



No. 781,095. PATENTBD JAN. s1, 1905.

H. R. R0BENSONIk `LOGGIA@ APPARATUS,

' APPLIUATION FILED JUNE 2o, 1904.

UNITED STATES Patented January 31, 1905.

VPATENT OFFICE.

HUGH RODERICK ROBERTSON, OF PORTLAND, OREGON.

LoGelNe. APPARATUS.

SPECIFICATION yfornfiing part of `Letters Patent No. 781,095, dated January 31, 1905.

Application filed June 20,1904. Serial No. 213,237.

T a/ZZ whom it may concern.-

`Be it known that I, HUGH RoDERIcK ROB-1 -and other devices adapted to take hold of the logs and haul them to the central station. In a well-known form of apparatus of the class there is an overhead wire or track cable,upon which a trolley travels. The trolley is sent out by means of a trip or haul-back line and is drawn in bythe hauling-line, which serves also as the lifting-line.

My invention is an improvement in this class of apparatus using an overhead wire or track cable; and its objects are to avoid the necessity existing in the old form of apparatus of lifting the log or timber up to the trolley before imposes on the trip-line.

- the hauling in can commence and Ito relieve the excessive strain such lifting and carrying These objects are all the more important in view of the fact that their accomplishment enables me to handle whole treesthe size of which as they exist in the Northwest would render impracticable the common practice of lifting and carrying the logs high up.

My invention consists in the novel combinations of parts which I shall Ahereinafter fully describe.

Referring to the accompanying drawing,. the figure is a perspective view showing my apparatus/a situ. l

A is an engine having three winding-drums, thel drum c being the trip-line drum, a the lift-line drum, and ft2-the hauling-line drum.

B is a mast suitably stayed andgu'yed.

O is the overhead wire or track cable. It is carried in the top of mast B, and its end is provided with a suitable tightener c. From the mast the overhead wire C extends off in suitable direction to a block D, secured at a proper point and distance to a tree E, and from this block it descends to an anchorage.

Upon the overhead wire is mounted the trolley F. j

G' is the tripor haul-back line. It passes from drum c to a block g, hung from the head of the mast, andv thence in any direction to.

get it out of the way of the track-cable and other lines--say, as here shown, to aV guideblock g on a stump off to one side, and thence to a terminal or head block g2 in the vicinity of the end of the overhead wire or track, and

thence back to the trolley F, to which it is secured. y

' H is the lifting-line. It passes Afrom drum c' to a block 7L, hung from the head of the mast, and thence to a block t', h ung from the trolley F. Through this block t and a block h2, secured to the butt-hook I, the lifting-line is passed to form a tackle, as shown.

J is the hauling-line. It passes from drum a2 through a guide-block j, hung to the mast, and thence to the butt-hook I, to the ring of which it is secured.

K represents a fallen whole tree. Upon its l small end or top is secured a choker-band la, and with this the hook I engages.

The essential feature of the use of this apparatus is the lifting of the engaged end of thetree onlyv high enough to clear any obstructions. when working with whole trees of great size is all that is practicable. The function of the This is all that is needed, andl lifting-line H in my apparatus is merely and solely to lift the point of the tree high enough to clear obstructions of every kind, whether they be stumps, or logs, or other trees, or brush, or debris, or inequalities of the ground, and to carry it so lifted. Now by the addition to the apparatus of the separate haulingline J the tree, the point of which is thus lifted and carried by line H, may be hauled in, its butt dragging on the ground and riding over every obstruction. Y

1n the common form of apparatus designed for much smaller sticks the lifting and hauling is done by a single line, which from its drum passesv to a block at the head of the IOO mast, thence to a block hung to the trolley, and thence directly down, as a single line, to the butt-hook. With such a construction it is obvious that the first eifect of winding in on the line is to lift the log, and this lifting has to continue until the log is carried chocka-block to the trolley before any hauling in can take place by the same line. This is too great a strain when handling large sticks. In addition to this disadvantage the common apparatus has the further drawback, because of the single lifting-line passing directly down from the trolley to the hook, of imposing a severe strain on the trip or haul-back line While the log is being held and carried chocka-block. This is because the trip-line must I offer the necessary resistance to the lifting and carrying strain while the log is being hauled in by the same line which lifts and carries it. In my construction by reason of passing the lift-line between the trolley and hook through the blocks to form a tackle instead of a direct connection the tackle thus formed is better adapted to carry the weight and relieve undue strain on the trip or haul-back lne.

Having thus described my invention, what I claim as new, and desire to secure by Letters Patent, is

1. A logging apparatus comprising an overhead wire or track cable, a trolley traveling thereon, a lifting-line guided by a block on the trolley and having a means on its depending extremity for engaging the log, a haulingline secured to the log-engaging ,extremity of the lifting-line, a trip or haul-back line suitably guided and secured to the trolley, and separate winding-drums for operating each of said lines.

2. Alogging apparatus comprising an overhead wire or track cable, a mast for carrying one end of said wire or cable, a trolley traveling on said wire or cable, a liftingline guided by a block at the head of the mast to a block on the trolley and having a means on its extremity depending from the trolleyblock, for engaging the log, a trip or haulback line, guided by a block on the head ol. the mast, said line being' secured to the trolley, a hauling-line guided by a block on the mast and secured to the log-engaging extremity of the lifting-line, and separate windingdrums for operating said lines.

3. A logging apparatus comprising an overhead wire or track cable, a trolley traveling thereon, a lifting-line having a hook on its extremity for engaging the log, a block on the trolley and a block on the hook, the said lifting-line being passed between said blocks to form a tackle, a hauling-line secured to the hook, a trip or haul-back line suitably guided and secured to the trolley, and separate winding-drums for operating each of said lines.

4. A logging apparatus comprising an overhead wire or track cable, a trolley traveling thereon, a lifting-line having a hook on its extremity for engaging the log, a block on the trolley and a block on the hook, the said lifting-line being passed between said blocks to form a tackle, a hauling-line secured to the hook, a trip or haul-back line suitably guided and secured to the trolley, a mast for supporting one end of the overhead wire or track cable, suitable blocks on said mast for guiding the lines, and separate winding-drums for operating each of said lines.

In witness whereof I have hereunto set my hand.

HUGH ltOlllllllCK ROBERTSON.

W'itnesses:

WALTER F. VANlc, D. B. RICHARDS. 

